Determining if /dev/console = /dev/fb and not /dev/ttya

[Joe Smith]

I want to have my .logout script put a rasterfile on the screen when I
logout on a workstation.  Using "if (`tty` == /dev/console)" I can reject
logins from the dialup ports and rlogin sessions, the file server has
/dev/ttya as its console.  My first misguided attempt to check if
/dev/console is the same as /dev/ttya caused the server to panic with a
bus error.  Any suggestions?

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